Signal driving method, signal driving apparatus and touch control chip

Abstract

A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. The method comprises, in a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N≤P and |M−N|≤Q. The method further comprises, in a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L≤P, |K−L|≤Q and M+K≥P. Q denotes a number of detection electrodes which makes an active pen not cause moire after the cancelling, and P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen.

What is claimed is: 
     
       1. A signal driving method, comprising:
 in a first signal driving period, applying non-inverting drive signals to M adjacent detection electrodes and applying inverting drive signals to N adjacent detection electrodes, wherein M+N≤P; and 
 in a second signal driving period, applying non-inverting drive signals to K adjacent detection electrodes and applying inverting drive signals to L adjacent detection electrodes, wherein K+L≤P; 
 wherein: 
 one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes; 
 non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods; 
 P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; 
 chip sequences prescribed in an active pen protocol are designated as the non-inverting drive signals; and 
 phases of the inverting drive signals are 180 degrees opposite to phases of the non-inverting drive signals. 
 
     
     
       2. The signal driving method according to  claim 1 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes. 
     
     
       3. The signal driving method according to  claim 1 , wherein the non-inverting drive signals are applied to the at least one of the P detection electrodes in more than two signal driving periods. 
     
     
       4. The signal driving method according to  claim 1 , wherein |M−N|≤Q, |K−L|≤Q, Q=2 or Q=1, wherein Q denotes a number of detection electrodes which makes an active pen not cause moire after cancellation between the non-inverting drive signals and the inverting drive signals. 
     
     
       5. The signal driving method according to  claim 1 , wherein M−N=0 or K−L=0. 
     
     
       6. The signal driving method according to  claim 1 , wherein each of the P detection electrodes is applied a non-inverting drive signal in at least one signal driving period. 
     
     
       7. The signal driving method according to  claim 1 , wherein no drive signal is applied to I detection electrodes in the P detection electrodes in at least one signal driving period. 
     
     
       8. A signal driving apparatus, comprising:
 a signal driving module, configured to: 
 in a first signal driving period, apply non-inverting drive signals to M adjacent detection electrodes and apply inverting drive signals to N adjacent detection electrodes, wherein M+N≤P; and 
 in a second signal driving period, apply non-inverting drive signals to K adjacent detection electrodes and apply inverting drive signals to L adjacent detection electrodes, wherein K+L≤P; 
 wherein: 
 one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes; 
 non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods; 
 P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; 
 chip sequences prescribed in an active pen protocol are designated as the non-inverting drive signals; and 
 phases of the inverting drive signals are 180 degrees opposite to phases of the non-inverting drive signals. 
 
     
     
       9. The signal driving apparatus according to  claim 8 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes. 
     
     
       10. The signal driving apparatus according to  claim 8 , wherein the non-inverting drive signals are applied to the at least one of the P detection electrodes in more than signal driving periods is greater than or equal to 1. 
     
     
       11. The signal driving apparatus according to  claim 8 , wherein |M−N|≤Q, |K−L|≤Q, Q=2 or Q=1, wherein Q denotes a number of detection electrodes which makes an active pen not cause moire after cancellation between the non-inverting drive signals and the inverting drive signals. 
     
     
       12. The signal driving apparatus according to  claim 8 , wherein M−N=0 or K−L=0. 
     
     
       13. The signal driving apparatus according to  claim 8 , wherein each of the P detection electrodes is applied a non-inverting drive signal in at least one signal driving period. 
     
     
       14. The signal driving apparatus according to  claim 8 , wherein no drive signal is applied to I detection electrodes in the P detection electrodes in at least one signal driving period. 
     
     
       15. A touch control chip, comprising: a signal driving apparatus, comprising:
 a signal driving module, configured to: 
 in a first signal driving period, apply non-inverting drive signals to M adjacent detection electrodes and apply inverting drive signals to N adjacent detection electrodes, wherein M+N≤P; and 
 in a second signal driving period, apply non-inverting drive signals to K adjacent detection electrodes and apply inverting drive signals to L adjacent detection electrodes, wherein K+L≤P; 
 wherein: 
 one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes; 
 non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods; 
 P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; 
 chip sequences prescribed in an active pen protocol are designated as the non-inverting drive signals; and 
 phases of the inverting drive signals are 180 degrees opposite to phases of the non-inverting drive signals. 
 
     
     
       16. The touch control chip according to  claim 15 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes. 
     
     
       17. The touch control chip according to  claim 15 , wherein the non-inverting drive signals are applied to the at least one of the P detection electrodes in more than signal driving periods is greater than or equal to 1. 
     
     
       18. The touch control chip according to  claim 15 , wherein |M−N|≤Q, |K−L|≤Q, Q=2 or Q=1, wherein Q denotes a number of detection electrodes which makes an active pen not cause moire after cancellation between the non-inverting drive signals and the inverting drive signals. 
     
     
       19. The touch control chip according to  claim 15 , wherein each of the P detection electrodes is applied a non-inverting drive signal in at least one signal driving period. 
     
     
       20. The touch control chip according to  claim 15 , wherein no drive signal is applied to I detection electrodes in the P detection electrodes in at least one signal driving period; and
 M−N=0 or K−L=0.